PMID- 27780541 OWN - NLM STAT- MEDLINE DCOM- 20180112 LR - 20180503 IS - 1532-3102 (Electronic) IS - 0143-4004 (Linking) VI - 47 DP - 2016 Nov TI - ATF3 is a negative regulator of inflammation in human fetal membranes. PG - 63-72 LID - S0143-4004(16)30525-2 [pii] LID - 10.1016/j.placenta.2016.09.006 [doi] AB - INTRODUCTION: Infection and inflammation stimulate pro-inflammatory cytokines, prostaglandins and matrix metalloproteinase (MMP)-9, which play a central role in myometrial contractions and rupture of fetal membranes. In human and mouse immune cells, activating transcription factor 3 (ATF3) is a negative regulator of inflammation. No studies have examined the role of ATF3 in human labour. METHODS: Primary amnion cells were used to determine the effect of interleukin (IL)-1beta and the bacterial product fibroblast-stimulating lipopeptide (fsl-1) on ATF3 expression, and the effect of ATF3 siRNA on pro-labour mediators. ATF3 expression was assessed in fetal membranes from non-labouring and labouring women at term and preterm, and after preterm pre-labour rupture of membranes (PPROM). RESULTS: IL-1beta and fsl-1 significantly increased ATF3 expression. Silencing ATF3 significantly increased IL-1beta- or fsl-1-induced expression of pro-inflammatory cytokines (TNF-alpha, IL-1alpha, IL-1beta, IL-6) and chemokines (IL-8 and monocyte chemoattractant protein-1 (MCP-1)); cyclooxygenase-2 (COX-2) mRNA expression and prostaglandin PGF(2alpha) release; and MMP-9 expression. ATF3 expression was decreased in fetal membranes with term labour. There was no effect of preterm labour or PPROM on ATF3 expression. DISCUSSION: ATF3 is a negative regulator of inflammation in human fetal membranes; in primary amnion cells, ATF3 expression is induced by IL-1beta and fsl-1, and ATF3 silencing further exacerbates the inflammatory response when stimulated with these factors. Subsequently, ATF3 expression is decreased in fetal membranes after term labour and with preterm chorioamnionitis, conditions closely associated with inflammation and infection. Our data suggest that ATF3 may play a role in the terminal processes of human labour and delivery. CI - Copyright (c) 2016 Elsevier Ltd. All rights reserved. FAU - Lim, Ratana AU - Lim R AD - Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia; Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia. FAU - Barker, Gillian AU - Barker G AD - Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia; Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia. FAU - Liong, Stella AU - Liong S AD - Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia; Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia. FAU - Nguyen-Ngo, Caitlyn AU - Nguyen-Ngo C AD - Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia; Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia. FAU - Tong, Stephen AU - Tong S AD - Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia; Translational Obstetrics Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia. FAU - Kaitu'u-Lino, Tu'uhevaha AU - Kaitu'u-Lino T AD - Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia; Translational Obstetrics Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia. FAU - Lappas, Martha AU - Lappas M AD - Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia; Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia. Electronic address: mlappas@unimelb.edu.au. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160914 PL - Netherlands TA - Placenta JT - Placenta JID - 8006349 RN - 0 (ATF3 protein, human) RN - 0 (Activating Transcription Factor 3) RN - 0 (Cytokines) RN - 0 (Diglycerides) RN - 0 (FSL-1 lipoprotein, synthetic) RN - 0 (Interleukin-1beta) RN - 0 (Oligopeptides) SB - IM MH - Activating Transcription Factor 3/genetics/*metabolism MH - Cell Line MH - Chorioamnionitis/metabolism MH - Cytokines/genetics/metabolism MH - Diglycerides/pharmacology MH - Extraembryonic Membranes/drug effects/*metabolism MH - Female MH - Fetal Membranes, Premature Rupture/genetics/*metabolism MH - Humans MH - Inflammation/*metabolism MH - Interleukin-1beta/pharmacology MH - Labor, Obstetric/metabolism MH - Oligopeptides/pharmacology MH - Pregnancy OTO - NOTNLM OT - ATF3 OT - Fetal membranes OT - Human labour OT - Infection OT - Inflammation EDAT- 2016/10/27 06:00 MHDA- 2018/01/13 06:00 CRDT- 2016/10/27 06:00 PHST- 2016/07/18 00:00 [received] PHST- 2016/09/07 00:00 [revised] PHST- 2016/09/13 00:00 [accepted] PHST- 2016/10/27 06:00 [pubmed] PHST- 2018/01/13 06:00 [medline] PHST- 2016/10/27 06:00 [entrez] AID - S0143-4004(16)30525-2 [pii] AID - 10.1016/j.placenta.2016.09.006 [doi] PST - ppublish SO - Placenta. 2016 Nov;47:63-72. doi: 10.1016/j.placenta.2016.09.006. Epub 2016 Sep 14.